As “SCOOB!” attempts to stretch a Saturday morning cartoon into a feature-length film and capture a new audience, it ends up overstuffed with far too many plots, characters and references to make sense.

While it sometimes struggles to balance its tone – switching between heartfelt, vicious, raunchy and inspiring all in a matter of minutes – Feldstein’s impressive ability to perfectly match whatever is thrown her way makes “How to Build a Girl” worth the watch.